Locking storage box



FIG. 1 is an orthographic projection of a locking storage box showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof; and,

FIG. 6 is an end elevational view thereof. 

The ornamental design for a locking stroage box, as shown and described. 